body{
	background:#18f0e8;
}
.ord{/*class选择器*/
        color: #f0f;
 }
 ul li{/*后代选择器*/
 	font-size:15px;
 	font-family:宋体;
 }
 ul>li{/*后代选择器*/
 	font-size:20px;
 	font-family：黑体;
 }
 span,.ord{
 	background:rgba(0,0,0,0.3);
 }
 ul+span{
 	line-height:30px;
 	color:red;
 }
 .ord.haha{
 	background:rgba(255,0,0,0.3);
 }
style="height: 100px;width: 100px;border-radius: 50%;"